Screw base for 1/4" push to lock ball valve

Push to connect fittings are great for water and compressed air, but the ball valves (e.g. https://www.amazon.com/Malida-Connector-filters-purifiers-Reverse/dp/B019U87UQ4/) are little uncomfortable to use regularly. This thing is a surface mount base. The valve just snaps in. If I make a new version I would round over the corners, but I don't know how to do that in openscad.

Added a flat base version that is quicker to print.